CN101503193A - White carbon black drying system using fire coal circulating fluid bed hot-air furnace - Google Patents
White carbon black drying system using fire coal circulating fluid bed hot-air furnace Download PDFInfo
- Publication number
- CN101503193A CN101503193A CNA2008101433423A CN200810143342A CN101503193A CN 101503193 A CN101503193 A CN 101503193A CN A2008101433423 A CNA2008101433423 A CN A2008101433423A CN 200810143342 A CN200810143342 A CN 200810143342A CN 101503193 A CN101503193 A CN 101503193A
- Authority
- CN
- China
- Prior art keywords
- carbon black
- fluid bed
- air
- circulating fluid
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention relates to a white carbon black drying system using a coal-fired circulating fluid bed air heating furnace, which comprises a circulating fluid bed air heating furnace system that is provided with a heat exchange surface in the furnace for controlling combustion temperature and co-producing steam, a flue gas reverse-flow system used for regulating the flow rate of the flue gas of a hot air heat exchanger and recovering the waste heat and a white carbon black sizing agent drying system used for exchanging the heat of clean air and the hot air heat exchanger and recovering the heat of tail gas of a dryer. The invention takes coal as fuel, the fuel is low in cost and wide in source, and multiple systems can be used for recovering and utilizing heat energy, so that the thermal efficiency is high, the energy consumption is low, the drying effect of the white carbon black is good, and the service life of the air heating furnace and the heat exchanger is long.
Description
Technical field
The present invention relates to a kind of dehumidification system, particularly a kind of is fuel with the coal, adopts the white carbon black dehumidification system of fluid bed heat wind furnace.
Background technology
Traditional white carbon black drying process is divided into two kinds basically, a kind of is to be that fuel burns in roasting kiln with clean fuel as oil, gas etc., warm air after the burning directly enters moisture eliminator, perhaps directly utilizes Electric heating, and heating white carbon black slurry generates desired product.There is the higher shortcoming of fuel cost in this technology, and the oil anxiety is global energy crisis, is unfavorable for energy-conserving and environment-protective.
Another kind of technology is to be fuel with the coal, burns in roasting kiln, carries out thermal exchange by interchanger and generates clean hot blast, and clean hot blast enters moisture eliminator heating white carbon black slurry and generates desired product.A wind effluxes after by the fly-ash separator dedusting.This process fuel cost is lower, but in order to guarantee the normal use of interchanger, roasting kiln needs very big coefficient of excess air, could guarantee the requirement of interchanger to exhaust gas volumn and flue-gas temperature.Because too high coefficient of excess air causes roasting kiln thermo-efficiency not high.Do not have heat-transfer surface in the stove, temperature height in the stove causes furnace wall and interchanger life-span short.As adopt fluid-bed combustion furnace, and then the operability of roasting kiln is also bad, and furnace temperature is wayward.Can not arrange fly-ash separator in the stove, can't realize returning grey ciculation fluidized burning, make the unburned carbon in flue dust height, the burnout rate of fuel is low.
Summary of the invention
Technical problem to be solved by this invention is: overcome the deficiencies in the prior art, and provide a kind of is fuel with the coal, and fuel cost is low, wide material sources, thermo-efficiency height, energy consumption is low, the white carbon black drying effect is good, the white carbon black dehumidification system of hotblast stove and interchanger long service life.
The technical solution used in the present invention is: the white carbon black dehumidification system of this use fire coal circulating fluid bed hot-air furnace comprises the circulating fluid bed hot-air furnace system of heat-transfer surface control temperature of combustion coproduction simultaneously steam in the layout stove; The smoke backflow system that can regulate hot blast interchanger flue gas flow and heat recovery; A uncontaminated air and the heat exchange of hot blast interchanger are also recycled the white carbon black slurry drying system of moisture eliminator tail gas heat quantity.
In the technique scheme, the circulating fluid bed hot-air furnace system, comprise circulating fluid bed hot-air furnace, the U type returns grey device, bellows, the furnace bottom gas blower, cold slag machine, ash tube, ventilation terminal, advance coal bunker, the backflow airduct, drum, the burner hearth of circulating fluid bed hot-air furnace is arranged the water heat-transfer surface, furnace outlet is installed the dedusting in stove device, the hotblast stove back segment is arranged the hot blast interchanger, dedusting in stove device bottom connects the U type and returns grey device, the U type returns grey device and is communicated with burner hearth, the furnace bottom gas blower passes through bellows, ventilation terminal is air blast in burner hearth, and furnace bottom has ash tube and cold slag machine, and hotblast stove one side is installed into coal bunker, the backflow airduct is installed on top, and drum is installed at the hotblast stove top.
In the technique scheme, the smoke backflow system comprises backflow blower fan, smoke induced draught fan, fly-ash separator, flying dust storehouse, the exhanst gas outlet of hot blast interchanger connects the fly-ash separator input terminus, the fly-ash separator bottom connects the flying dust storehouse, and the flue gas after the fly-ash separator dedusting effluxes by smoke induced draught fan respectively and returns burner hearth by the backflow blower fan.
In the technique scheme, white carbon black slurry drying system comprises heat exchange gas blower, drying machine, trap, product storehouse, air heat exchanger, the dried induced draft fan of spray, heat exchange gas blower two ends connect air heat exchanger and hot blast interchanger respectively, the hot blast interchanger the other end connects drying machine, drying machine dialogue carbon black slurry carries out heat drying, drying machine output connects trap, the product storehouse is installed in the trap lower end, and trap tail gas is exported by entering atmosphere behind air heat exchanger, the dried induced draft fan of spray.
In the system of the present invention, described gas blower, backflow blower fan, induced draft fan, interchanger, moisture eliminator, fly-ash separator, flying dust storehouse, product storehouse etc., can be according to required dry production capacity size, buy corresponding standardized product from the market, reach the RH type heat exchanger of company of the dry Engineering Co., Ltd of power, the blower fan of Shanghai Jia Ruitong wind devices company limited etc. as GLZ type drying machine, the Shanghai of adopting the high benefit in Wuxi to reach drying plant factory.
Outstanding feature of the present invention and unusual effect:
1, because burner hearth is furnished with heating surface, the air coefficient that can control the afterbody surplus is no more than 1.8 (coefficient of excess air is too high, and then thermo-efficiency reduces).Be furnished with high-temperature separator, unburned carbon in flue dust is in 8%, and overall thermal efficiency can also be protected furnace wall more than 83%.If burner hearth is not arranged heating surface, the air coefficient of portion surplus is no more than more than 2.5, can't set up separator, and unburned carbon in flue dust is more than 20%, and thermo-efficiency is no more than 72%.
2, because set up separator, realize circulating combustion, reduced the flying dust concentration in the flue gas, reduced the particle diameter of flying dust, reduced the wearing and tearing of heat exchanging device, prolonged the life-span of interchanger, reduced maintenance cost.
3, adopted the smoke backflow system of heat recovery and sprayed dried tail gas heat quantity recovery system owing to system of the present invention, so system high efficiency is energy-conservation, heat energy recycle rate height, energy consumption is low, the thermo-efficiency height.Again because circulating fluid bed hot-air furnace of the present invention system arranges fly-ash separator in stove; not only protected the hot blast interchanger; and the flying dust that separates of dedusting in stove device returns grey device through the U type and sends into the burner hearth burning once more; greatly reduced the carbon content of flying dust flue gas; the environmental protection treatment that helps energy-saving and cost-reducing and flue gas; the a plurality of systems of the present invention regulate feedback automatically, and complete machine performance of the present invention is further improved.
4, circulating fluid bed hot-air furnace of the present invention has been drawn the advantage of hotblast stove and steam boiler; both shortcomings have been abandoned; as: hotblast stove interchanger is arranged; but there is not the water wall protection; and existing steam boiler has the water wall protection; but do not have the hot blast interchanger, structure of the present invention and performance are better than the two, and multiple functional.
Description of drawings:
Fig. 1 is a system architecture schematic diagram of the present invention
The accompanying drawing marking explanation:
1---dedusting in stove device 2---the U type returns grey device 3---bellows
4---furnace bottom gas blower 5---cold slag machine 6---ash tubes
7---ventilation terminal 8---advances coal bunker 9---water wall
10---backflow airduct 11---drum 12---hot blast interchanger
13---backflow blower fan 14---smoke induced draught fan 15---fly-ash separators
16---flying dust storehouse 17---heat exchange gas blower 18---drying machines
19---trap 20---product storehouse 21---air heat exchangers
22---spray dried induced draft fan
Embodiment:
Referring to Fig. 1, the present invention includes: the circulating fluid bed hot-air furnace system of a layout stove interior heat-transfer surface control temperature of combustion coproduction simultaneously steam; The smoke backflow system that can regulate hot blast interchanger flue gas flow and heat recovery; A uncontaminated air and the heat exchange of hot blast interchanger are also recycled the white carbon black slurry drying system of moisture eliminator tail gas heat quantity.
The circulating fluid bed hot-air furnace system, comprise that dedusting in stove device 1, U type return grey device 2, bellows 3, furnace bottom gas blower 4, cold slag machine 5, ash tube 6, ventilation terminal 7, advance coal bunker 8, water wall 9, backflow airduct 10, drum 11, hot blast interchanger 12, described circulating fluid bed hot-air furnace designs heat-transfer surface such as water wall 9 in the suitable stove according to hot blast interchanger 12 required exhaust gas volumns, thus control combustion product gases temperature.Described circulating fluid bed hot-air furnace burner hearth is arranged the water heat-transfer surface, and back segment is arranged the hot blast interchanger.Byproduct steam when described circulating fluid bed hot-air furnace can be produced hot blast at the same time.The furnace wall of described circulating fluid bed hot-air furnace adopts heavy boiler setting to arrange; burner hearth arranges that heating surface is light pipe water cooling tube and pipe laying; the air coefficient that can control the afterbody surplus is no more than 1.8; avoided pure hotblast stove furnace wall not have the water wall tube protection simultaneously, the local temperature height causes the defective that the furnace wall life-span is short, maintenance cost is big.Circulating fluid bed hot-air furnace is furnished with dedusting in stove device 1, can carry out gas solid separation, has reduced the flying dust concentration in the flue gas and the particle diameter of flying dust, has reduced the wearing and tearing of heat exchanging device, has prolonged the life-span of interchanger, has reduced maintenance cost.The flying dust that separates returns grey device through the U type and sends into the burner hearth circulating combustion, and unburned carbon in flue dust can be controlled in 8%.
The smoke backflow system, comprise backflow blower fan 13, smoke induced draught fan 14, fly-ash separator 15, flying dust storehouse 16, after flue gas exchanges by exchanger heat 12, after entering fly-ash separator 15 dedustings again, flue dust enters ash dropping hopper 16, and a flue gas part enters atmosphere by smoke induced draught fan 14 after the dedusting, a part by backflow blower fan 13 enter burner hearth in, two layers of loopback flue gas interface loopback burner hearth being provided with of top, be used for regulating interchanger input gas temperature and exhaust gas volumn, fume afterheat is reused simultaneously.
Spray is done and the tail gas heat quantity recovery system, comprise heat exchange gas blower 17, drying machine 18, trap 19, product storehouse 20, air heat exchanger 21, the dried induced draft fan 22 of spray, the clean hot blast that comes out from the hot blast interchanger, enter drying machine 18 with 500 ℃～550 ℃ left and right sides temperature, collect product by trap 19 and enter product storehouse 20, dried 80～120 ℃ of waste heat tail gas are utilized once more, by the clean freezing air of air heat exchanger 21 preheatings, enter the hot blast interchanger through heat exchange gas blower 17, as the clean wind air intake of hot blast interchanger.
Enter fluidized bed combustion in the stove through the qualified coal of crushing and screening from advancing coal bunker 8, the high-temperature flue gas that produces enters convection tubes with 900 ℃ from furnace outlet behind pipe laying, furnace heating surface absorbing and cooling temperature, cooling enters dedusting in stove device 1 about 850 ℃, carry out gas solid separation, the flying dust that separates returns grey device 2 through the U type and sends into the burner hearth circulating combustion.Flue gas is by 12 heat exchanges of hot blast interchanger, reduce to 150 ℃ after fly-ash separator 15 dedustings, flue dust is discharged from the flying dust storehouse, a dedusting flue gas part enters atmosphere, enter atmosphere by smoke induced draught fan 14, a part by backflow blower fan 13 enter burner hearth in, 2 layers of loopback flue gas interface loopback burner hearth being provided with of top, be used for regulating interchanger input gas temperature and exhaust gas volumn, guarantee the interchanger requirement, fume afterheat is reused simultaneously.
Clean wind is through the air heat exchanger 21 30 ℃ of laggard hot blast interchanger 12 that raise, be warmed to 500～550 ℃ with the flue gas heat exchange after, enter drying machine 18, dialogue carbon black slurry carries out heat drying,, dry back product enters trap 19 and collects product storehouse 20 packings.Dry back tail gas and clean freezing air carry out effluxing after the heat exchange in air heat exchanger 21.
Embodiment:
With the hard coal is fuel, makes dehumidification system of the present invention, is applied to the production of white carbon black.Circulating fluid bed hot-air furnace is pressed 20t/h steam, the design of 2,050 ten thousand kca1/h hot blast rates in this dehumidification system, adopt the low speed Combustion technology of circulating fluidized, its subjective basis, structure, combustion equipment, steelframe, platform staircase, coal supply equipment, slagging-off ash disposal etc. design by the 48t/h boiler substantially.The dedusting in stove device adopts the water jacket structure, and its size is pressed the 60t/h calculation Design.Furnace wall adopts heavy boiler setting to arrange, burner hearth arranges that heating surface is light pipe water cooling tube and pipe laying, at tail vertical well location arrangements high-temperature flue gas interchanger.Interchanger is established smoke backflow system loop back hotblast stove burner hearth, sprays dried tail gas by air heat exchanger preheating freezing air, as the clean wind air intake of heat exchange system.
Adopt this scheme, with the hotblast stove dehumidification system of routine relatively, unburned carbon in flue dust is by dropping to less than 7% greater than 25%, excess air ratio is by dropping to less than 1.6 greater than 2.Thermo-efficiency is brought up to about 84% by about 72%, and thermo-efficiency is high more than 11 percentage points, and is energy-conservation 13%, consumes 80,000 tons of calculating of coal per year, year economizes on coal 1.04 ten thousand tons, by 400 yuan of calculating of coal per ton, year saves 4,160,000 yuan.
Claims (4)
1, a kind of white carbon black dehumidification system that uses fire coal circulating fluid bed hot-air furnace is characterized in that comprising the circulating fluid bed hot-air furnace system of heat-transfer surface control temperature of combustion coproduction simultaneously steam in the layout stove; The smoke backflow system that can regulate hot blast interchanger flue gas flow and heat recovery; A uncontaminated air and the heat exchange of hot blast interchanger are also recycled the white carbon black slurry drying system of moisture eliminator tail gas heat quantity.
2, a kind of white carbon black dehumidification system that uses fire coal circulating fluid bed hot-air furnace according to claim 1, it is characterized in that the circulating fluid bed hot-air furnace system, comprise circulating fluid bed hot-air furnace, the U type returns grey device, bellows, the furnace bottom gas blower, cold slag machine, ash tube, ventilation terminal, advance coal bunker, the backflow airduct, drum, the burner hearth of circulating fluid bed hot-air furnace is arranged the water heat-transfer surface, furnace outlet is installed the dedusting in stove device, the hotblast stove back segment is arranged the hot blast interchanger, dedusting in stove device bottom connects the U type and returns grey device, the U type returns grey device and is communicated with burner hearth, the furnace bottom gas blower passes through bellows, ventilation terminal is air blast in burner hearth, furnace bottom has ash tube and cold slag machine, hotblast stove one side is installed into coal bunker, the backflow airduct is installed on top, and drum is installed at the hotblast stove top.
3, a kind of white carbon black dehumidification system that uses fire coal circulating fluid bed hot-air furnace according to claim 1, it is characterized in that the smoke backflow system comprises backflow blower fan, smoke induced draught fan, fly-ash separator, flying dust storehouse, the exhanst gas outlet of hot blast interchanger connects the fly-ash separator input terminus, the fly-ash separator bottom connects the flying dust storehouse, and the flue gas after the fly-ash separator dedusting effluxes by smoke induced draught fan respectively and returns burner hearth by the backflow blower fan.
4, a kind of white carbon black dehumidification system that uses fire coal circulating fluid bed hot-air furnace according to claim 1, it is characterized in that white carbon black slurry drying system comprises the heat exchange gas blower, drying machine, trap, the product storehouse, air heat exchanger, spray dried induced draft fan, heat exchange gas blower two ends connect air heat exchanger and hot blast interchanger respectively, the hot blast interchanger the other end connects drying machine, drying machine dialogue carbon black slurry carries out heat drying, drying machine output connects trap, the product storehouse is installed in the trap lower end, trap tail gas output passing through air heat exchanger, enter atmosphere after spraying dried induced draft fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101433423A CN101503193B (en) | 2008-10-17 | 2008-10-17 | White carbon black drying system using fire coal circulating fluid bed hot-air furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101433423A CN101503193B (en) | 2008-10-17 | 2008-10-17 | White carbon black drying system using fire coal circulating fluid bed hot-air furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101503193A true CN101503193A (en) | 2009-08-12 |
| CN101503193B CN101503193B (en) | 2011-09-07 |
Family
ID=40975583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101433423A Active CN101503193B (en) | 2008-10-17 | 2008-10-17 | White carbon black drying system using fire coal circulating fluid bed hot-air furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101503193B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923719A (en) * | 2012-10-29 | 2013-02-13 | 无锡恒诚硅业有限公司 | Dry tail gas waste heat recovery system for white carbon black production |
| CN104418329A (en) * | 2013-08-23 | 2015-03-18 | 确成硅化学股份有限公司 | Method for using sulfur combustion heat for drying white carbon black |
| CN113955760A (en) * | 2021-10-22 | 2022-01-21 | 福建思科硅材料有限公司 | White carbon black preparation equipment and process |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1803599A (en) * | 2005-05-31 | 2006-07-19 | 株洲工学院科技开发部 | Process and apparatus for preparing high-purity silicon dioxide by utilizing rice hull |
| CN1331744C (en) * | 2005-06-08 | 2007-08-15 | 德固赛嘉联白炭黑（南平）有限公司 | Process for producing white carbon black and sodium sulphite by sodium sulfate method |
| CN201289268Y (en) * | 2008-10-17 | 2009-08-12 | 株洲兴隆化工实业有限公司 | Carbon white drying system using fire coal circulating fluid bed hot-air stove |
-
2008
- 2008-10-17 CN CN2008101433423A patent/CN101503193B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923719A (en) * | 2012-10-29 | 2013-02-13 | 无锡恒诚硅业有限公司 | Dry tail gas waste heat recovery system for white carbon black production |
| CN102923719B (en) * | 2012-10-29 | 2015-09-23 | 无锡恒诚硅业有限公司 | For the waste heat recovery system of drying tail gas of white carbon black production |
| CN104418329A (en) * | 2013-08-23 | 2015-03-18 | 确成硅化学股份有限公司 | Method for using sulfur combustion heat for drying white carbon black |
| CN113955760A (en) * | 2021-10-22 | 2022-01-21 | 福建思科硅材料有限公司 | White carbon black preparation equipment and process |
| CN113955760B (en) * | 2021-10-22 | 2023-06-16 | 福建思科硅材料有限公司 | Preparation equipment and process of white carbon black |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101503193B (en) | 2011-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103968401B (en) | Dedusting-desulfurization-UTILIZATION OF VESIDUAL HEAT IN integral system of low PM2.5 discharge | |
| WO2021109324A1 (en) | Modularized natural convection boiler system for recovering waste heat of liquid slag | |
| CN102183155A (en) | Smoke high-temperature dust removal and steam and coal gas recovery system and method for calcium carbide furnace | |
| CN100513962C (en) | Smoke removing, temp lowering, afterheat using and recovering system in arc furnace and its dust removing technology | |
| CN101503193B (en) | White carbon black drying system using fire coal circulating fluid bed hot-air furnace | |
| CN102492447B (en) | Coking coal damping process for internal-heating type forced heat transferring fluidized bed | |
| CN201289268Y (en) | Carbon white drying system using fire coal circulating fluid bed hot-air stove | |
| CN205448732U (en) | Energy saving and emission reduction's sintering gas cleaning system | |
| CN204830454U (en) | Many return strokes living beings hot -blast furnace | |
| CN201047710Y (en) | Energy-saving clean hot air generator | |
| CN201917230U (en) | Afterheat concentrated recovering device for tubular heating furnace | |
| CN102012057B (en) | Boiler heating device with organic heat carrier of high efficiency, energy saving, environmental protection and gas liquid two-phase | |
| CN109028093A (en) | A kind of multipaths coupled electricity-generation system using fossil fuel Yu oxygen-enriched combusting rubbish | |
| CN205424962U (en) | Boiler fume afterheat recovery device | |
| CN210568552U (en) | Boiler energy-saving and flue gas whitening system | |
| CN210688301U (en) | Novel flue gas recirculation system | |
| CN108722380B (en) | Powdery desulfurization active coke analysis tower and working method | |
| CN2591047Y (en) | Hot-blast furnace waste gas comprehensive utilizing device | |
| CN101995165A (en) | Electric furnace waste heat recycling and dedusting device | |
| CN201149425Y (en) | System of calcium carbide stove for recovering CO | |
| CN201421186Y (en) | High-efficiency energy-saving emission-reducing organic heat carrier boiler of circulating fluidize bed | |
| CN107477564A (en) | A kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system and method | |
| CN209470203U (en) | Novel super-low discharge cycle fluidized bed water-coal-slurry hot-water boiler | |
| CN103657406A (en) | Low-temperature flue denitration system | |
| CN202337761U (en) | Coking coal humidity adjustment system of energy-saving fluidized bed |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHUZHOU XINGLONG NEW MATERIALS CO., LTD. Free format text: FORMER NAME: ZHUZHOU XINGLONG CHEMICAL INDUSTRY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 412006 Zhuzhou City, Hunan province leading Shifeng District Town Industrial Area Patentee after: ZHUZHOU XINGLONG CHEMICAL INDUSTRIAL CO., LTD. Address before: Zhuzhou City, Hunan province 412006 Shifeng District leading town Patentee before: Zhuzhou Xinglong Chemical Industrial Co., Ltd. |